Cabling Specifications

This appendix describes cables and cabling guidelines for the Cisco 1700 router and contains the following sections:

Note For information about cables used with Cisco WAN interface cards, refer to the Cisco WAN Interface Cards Hardware Installation Guide that comes with each of the cards.

Ethernet Cables

This section describes the Ethernet cables t hat are used to connect the router to your local Ethernet network. A 10/100BaseTX router, like the Cisco 1700 router, requires Category 5 unshielded twis ted-pair (UTP) or shielded twisted-pair (STP) cable.

RJ-45 Pin¹	Signal	Direction	RJ-45 Pin
1	TX+	--->	1
2	TX-	--->	2
3	RX+	<---	3
6	RX-	<---	6

Table B-1: Straight-Through Ethernet Cable (RJ-45-to-RJ-45)

RJ-45
Pin¹ Signal Direction RJ-45
Pin

1

TX+

--->

1

2

TX-

--->

2

3

RX+

<---

3

6

RX-

<---

6

¹Pins 4, 5, 7, and 8 are not used for signaling.

Pinouts

Ethernet Network Cabling Guidelines

Table B-2 describes some guidelines for creating Ethernet networks. Figures might vary, depending on the manufacturer of the network equipment.

Specification	10BaseT	100BaseTX
Maximum segment length	100 meters	100 meters
Maximum number of segments per network	5	With Class I repeaters: 1 With Class II repeaters: 2
Maximum hop count¹	4	With Class I repeaters: none With Class II repeaters: 1
Maximum number of nodes per segment	1024	1024
Cable type required	UTP Category 3, 4, or 5	UTP Category 5 or STP

Table B-2: Ethernet Cabling Guidelines

Specification 10BaseT 100BaseTX

Maximum segment length

100 meters

100 meters

Maximum number of segments per network

5

With Class I repeaters: 1

With Class II repeaters: 2

Maximum hop count¹

4

With Class I repeaters: none

With Class II repeaters: 1

Maximum number of nodes per segment

1024

1024

Cable type required

UTP
Category 3, 4, or 5

UTP Category 5 or STP

¹Hop count = Routing metric used to measure the distance between a source and a destination.

Console Cable and Adapters

A console cable kit is provided with your router. Use this kit when connecting your router to a PC or terminal.

The console cable kit contains:

RJ-45-to-RJ-45 console cable (blue)
RJ-45-to-DB-9 adapter (gray)

Table B-3 describes the wiring for the console port, the console cable, and the included adapters. This table also includes pinouts for an RJ-45-to-DB-25 adapter. Figure B-1 illustrates how to identify the console cable, which is also referred to as a rollover cable.

Console (DTE)	Console Port	Console Cable	Adapter	Adapter	Terminal (DTE)
Signal	RJ-45 Pin	RJ-45 Pin	DB-9 Pin	DB-25 Pin	Signal
RTS	1	8	8	5	CTS
DTR	2	7	6	6	DSR
TXD	3	6	2	3	RXD
GND	4	5	5	7	GND
GND	5	4	5	7	GND
RXD	6	3	3	2	TXD
DSR	7	2	4	20	DTR
CTS	8	1	7	4	RTS

Table B-3:

Console
(DTE) Console Port Console Cable Adapter Adapter Terminal
(DTE)

Signal RJ-45 Pin RJ-45 Pin DB-9 Pin DB-25 Pin Signal

RTS

1

8

8

5

CTS

DTR

2

7

6

6

DSR

TXD

3

6

2

3

RXD

GND

4

5

5

7

GND

GND

5

4

5

7

GND

RXD

6

3

3

2

TXD

DSR

7

2

4

20

DTR

CTS

8

1

7

4

RTS

Cons ole Cable and Adapter Pinouts
Figure B-1: Identifying a Rollover Cable

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